1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <utility> 11 12 // template <class T1, class T2> struct pair 13 14 // struct piecewise_construct_t { }; 15 // constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t(); 16 17 #include <utility> 18 #include <tuple> 19 #include <cassert> 20 21 class A 22 { 23 int i_; 24 char c_; 25 public: 26 A(int i, char c) : i_(i), c_(c) {} 27 int get_i() const {return i_;} 28 char get_c() const {return c_;} 29 }; 30 31 class B 32 { 33 double d_; 34 unsigned u1_; 35 unsigned u2_; 36 public: 37 B(double d, unsigned u1, unsigned u2) : d_(d), u1_(u1), u2_(u2) {} 38 double get_d() const {return d_;} 39 unsigned get_u1() const {return u1_;} 40 unsigned get_u2() const {return u2_;} 41 }; 42 43 int main() 44 { 45 #ifndef _LIBCPP_HAS_NO_VARIADICS 46 std::pair<A, B> p(std::piecewise_construct, 47 std::make_tuple(4, 'a'), 48 std::make_tuple(3.5, 6u, 2u)); 49 assert(p.first.get_i() == 4); 50 assert(p.first.get_c() == 'a'); 51 assert(p.second.get_d() == 3.5); 52 assert(p.second.get_u1() == 6u); 53 assert(p.second.get_u2() == 2u); 54 #endif 55 } 56
